题目内容
Even a person having no trouble with his body at all should have ________ cbecked every year．
- A.his
- B.he
- C.himself
- D.her
解析：
这句句子的意思是“哪怕一个健康上没什么问题的人也应该每年定期检查身体。”这里的“have sb checked”表示“让别人检查某人”，这个sb应该是个宾语，而前面有主语one person，所以我们在这里用himself．
Imagine that the genome (基因组) is a book. The book consists of 23 chapters with thousands of stories made up of paragraphs, words and letters on different levels. There are one billion words in the book, which makes it longer than 5,000 volumes the size of this book, or as long as 800 Bibles. If I read the genome out to you at the rate of one word per second for eight hours a day, it would take me a century. If I wrote out the human genome, one letter per millimeter, my text would be as long as the River Danube. This is an enormous document. A huge volume, a cook book of great length, and it all fits inside the extremely small nucleus (核) of a tiny cell that fits easily upon the head of a pin.
The idea of the genome as a book is not, strictly speaking, even a metaphor (比喻), It is true to a great extent. A book is a piece of digital information, written in one-directional form and defined by a code that translates a small alphabet of letters into a large dictionary of meanings through the order of their groupings. So is a genome. The only complication is that all English books read from left to right, while some parts of the genome read from left to right, and some from right to left, though never both at the same time.
While English books are written in words of different lengths using twenty-six letters. Genomes are written entirely in three-letter words, using only four letters, And instead of being written on flat pages, they are written on long chains of DNA molecules (分子), The genome is a very clever book, because in the right conditions it can both photocopy itself and read itself.
【小题1】How do human genomes read according to the passage?
| A．Only from left to right. | B．Only from right to left. |
| C．From both directions at the same time | D．From one direction at a time |
| A．is as long as the River Danube |
| B．can be easily placed on the head of a pin |
| C．is coded with and alphabet of four letters |
| D．is smart enough to read and take photos of itself |
| A．specialists in the field | B．general readers |
| C．natural scientists | D．readers with academic background |
| A．to focus on the differences between the two |
| B．to lay emphasis on the similarities between the two |
| C．to simplify the concept of the human genome |
| D．to give an exact description of the human genome |
Even a small reduction in salt in the diet can be a big help to the heart. A new study used a computer model to predict how just t
hree grams less a day would af
fect heart disease in the United States.
The result: thirteen percent fewer heart attacks. Eight percent fewer strokes. Four percent fewer deaths. Eleven percent fewer new cases of heart disease. And two hundred forty billion dollars in health care savings.
Researchers found it could prevent one hundred thousand heart attacks and ninety-two thousand deaths every year.
The study is in the New England Journal of Medicine. Kirsten, at the University of California, was the lead author. She says people would not even notice a difference in taste with three grams, or one-half teaspoon, less salt per day. The team also included researchers at Stanford and Columbia University.
Each gram of salt contains four hundred milligrams of sodium, which is how foods may list their salt content.
The government says the average American man eats ten grams of salt a day. The American Heart Association advises no more than three grams for healthy people. It says salt in the American diet has increased fifty percent since the nineteen seventies, while blood pressures have also risen. Less salt can mean a lower blood pressure.
New York City Mayor Michael Bloomberg is leading an effort called the National Salt Reduction Initiative. The idea is to put pressure on food companies and restaurants.
Mayor Bloomberg has already succeeded in other areas, like requiring fast food places in the city to list calorie information. Now a study by the Seattle Children's Research Institute shows how that idea can influence what parents order for their children.
Ninety-nine parents of three to six year olds took part. Half had McDonald's menus clearly showing how many calories were in each food. The other half got menus without the calorie information.
【小题1】 How many heart attacks will occur in the US every year？
| A．nearly 800,000. | B．24,000. |
| C．100,000. | D．92,000. |
| A．Americans ate no more than 5 grams of salt per day in the 1970s |
| B．the American Heart Association suggest less than 3 grams of salt every day |
| C．a reduction in salt in the diet helps lower blood pressure |
| D．all the heart diseases result from eating more salt |
| A．advise Americans to eat less salt |
| B．put pressure on food companies and restaurants |
| C．require fast food places to list calorie information |
| D．attract the public attention to the problem |
| A．strokes | B．heart attacks |
| C．blood pressures | D．stomach diseases |
| A．Less salt can mean more life |
| B．Prevent heart attacks and deaths |
| C．The National Salt Reduction Initiative |
| D．Americans should eat less salt |